调节桩身竖向刚度的实用方法

Practical Method to Adjust Vertical Stiffness of Pile Body

在同一承台或筏板基础下的基桩,若其竖向刚度相差太大,则在基桩竖向刚度较大处会形成应力集中,对承台或筏板基础造成不利影响。基此,文章提出通过设置桩顶褥垫层来调节桩身竖向刚度的方法,并通过采取相应的细部构造措施来满足基础传力及耐久性的要求。理论分析和实际监测结果满足国家相关规范要求。

The foundation piles,under the same cap or raft foundation,will form stress concentration,which has a negative impact,if the difference between their vertical stiffness is too large. A practical method by setting the pile top cushion layer for adjusting the vertical stiffness of the foundation pile,is proposed in this paper,and the corresponding detailed construction measures are adopted to meet the requirements of basic transmission and durability. The theoretical analysis and actual monitoring results meet the requirements of relevant national standards.